docs: def copy_from(self,
                    container: Container,
                    fn_container: str,
                    fn_host: str
                    ) -> None:
          """
          Copies a given file from the container to a specified location on the
          host machine.
          """
          logger.debug("Copying file from container, %s: %s -> %s",
                       container.uid, fn_container, fn_host)
          cmd = "docker cp '{}:{}' '{}'".format(container.id, fn_container, fn_host)
          try:
              subprocess.check_output(cmd, shell=True)
              logger.debug("Copied file from container, %s: %s -> %s",
                           container.uid, fn_container, fn_host)
          # TODO implement error handling
          except subprocess.CalledProcessError:
              logger.exception("Failed to copy file from container, %s: %s -> %s",  # noqa: pycodestyle
                               container.uid, fn_container, fn_host)
              raise